Insert CLOB into Oracle database

Question

My question is: How do you get around the ORA-01704: string literal too long error when inserting (or doing anything in queries) with CLO

Answer 1

You'll need to use bind variables rather than building a SQL statement using string concatenation. This will be beneficial from a security, performance, and robustness standpoint as well since it will reduce the risk of SQL injection attacks, decrease the amount of time Oracle has to spend doing hard parses of the SQL statement, and will eliminate the potential that there is a special character in the string that causes an invalid SQL statement to get generated (i.e. a single quote).

I would expect that you want something like

private void insertQueries(String tempTableName) throws FileNotFoundException, DataException, SQLException, IOException {
  String preQuery = "  into " + tempTableName + " values (?)" + StringHelper.newline;
  StringBuilder inserts = new StringBuilder("insert all" + StringHelper.newline);
  List readQueries = getDomoQueries();
  for (String query : readQueries) {
    inserts.append(preQuery);
  }
  inserts.append("select * from dual");

  Connection conn = ConnectionPool.getInstance().get(connection);
  PreparedStatement pstmt = conn.prepareStatement(
        inserts);
  int i = 1;
  for (String query : readQueries) {
    Clob clob = CLOB.createTemporary(conn, false, oracle.sql.CLOB.DURATION_SESSION);
    clob.setString(i, query);
    pstmt.setClob(i, clob);
    i = i + 1;
  }
  pstmt.executeUpdate();
}